Comparison

SmarterNoise Pro vs Decibel Meter X

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

SmarterNoise Pro

This advanced sound level meter app offers detailed audio analysis with features like frequency spectrum display and data export. It allows for precise sound measurements in both video and audio recording modes, with options for A-, C-, or no weighting.

Highlights
  • Sound level measurement in video/audio modes
  • Frequency spectrum display
  • Export measurement data (CSV)
  • Sound level activated audio recording
  • Calibration tool
  • Full HD video recording (paid)
Features
Read full description

SmarterNoise Pro is the most advanced edition of the SmarterNoise recording sound level meters. SmarterNoise Pro edition is developed especially with more advanced measurements in mind, and includes many requested features such as a frequency spectrum display, export of measurement data, A-, C- or no weighting for sound level measurement, and full screen audio mode. SmarterNoise Pro edition does not contain any advertising, and performs accurately and fast. Features: • Sound level measurement in video mode • Sound level measurement in audio mode • Sound meter snapshot camera • Record video and audio files (paid function) • Recording timer • Sound level activated audio recording • Frequency spectrum display (paid function) • Peak frequency detection • A-, C- or no frequency weighting • Export of measurement data in CSV format • Full HD (paid function), HD and VGA video resolution • Three video quality settings • Archive for saved files • Sharing of saved files • Calibration • Save location of measurement (optional) • Time and date • Continuous Leq, LAeq, LCeq value • 10 second sound level average (Leq, LAeq, LCeq) • 60 second sound level average (Leq, LAeq, LCeq) • Maximum and minimum decibel level About decibels and sound level measurement The unit for measuring sound is called a decibel. Because the decibel scale is logarithmic, a sound with an intensity that is twice that of a reference sound corresponds to an increase of about 3 decibels. The reference point of 0 decibel is set at the intensity of the least perceptible sound, the threshold of hearing. On such a scale a 10-decibel sound is 10 times the intensity of the reference sound. Highlighting this is important as already a few decibels higher or lower makes a noticeable difference in how noise is perceived. The preferred method to describe sound levels that vary over time, resulting in a single decibel value measuring the total sound energy over the period, is called Leq. It is however common practice to measure sound levels using A-weighting, which attenuates lower and higher frequencies that the average person cannot hear. In this case the value is called LAeq. A- and C-weighting The A-weighting is a standard, commonly used filter that attempts to alter the measured sound pressure levels to more closely match the perception of the human ear. A-weighting makes the sound level meter less sensitive to very high (over 8000 Hz) and low frequencies (below 1000 Hz). C-weighting also attenuates low and high frequencies, but the attenuation of low frequencies is much less severe compared to A-weighting. Calibrate: Calibrate the application using the calibration tool found in the settings menu. Phones and their components vary in quality and setup so you need to calibrate the app in order for the results to be relatively comparable. One suggestion is that you close the window and door to your bedroom or bathroom, turn off appliances, and once its very quiet calibrate the app so the reading is about 30 decibel.

About

Decibel Meter X

This application precisely measures sound levels and analyzes audio spectrums. It can also generate specific frequency sounds for testing, research, or therapeutic purposes. Its intuitive interface makes sound exploration accessible to all users.

Highlights
  • Precise decibel level measurement
  • Audio spectrum analysis
  • Spectrogram display
  • Generate specific frequency sounds
  • Intuitive user interface
  • Detailed usage instructions
Features
Read full description

【Decibel Meter X】 - Your Expert in Sound Measurement and Spectrum Analysis! Sound is an indispensable element in life. The Decibel Meter X is not only a precise sound measurement tool, but also boasts powerful spectrum analysis capabilities, revealing the multidimensional details of sound. Additionally, the App offers the functionality to generate specific frequency sounds, enriching your journey of sound exploration. With the Decibel Meter X, you can easily obtain the decibel level of your current environment, understanding the intensity of noise. The spectrum analysis feature decomposes sound into its various frequency components, allowing you to delve deeper into the composition and characteristics of sound. Whether it's music, voices, or other sounds, the App can display their spectrograms, giving you a more intuitive understanding of sound. Moreover, the Decibel Meter X also has the capability to generate specific frequency sounds. You can set different frequencies and volumes to produce pure sound signals. This feature can be used for sound testing and research, as well as for sound therapy, musical instrument tuning, and various other scenarios, broadening the application of sound. Ease of use and a clear, intuitive interface are another highlight of the Decibel Meter X. Whether you're a beginner or a professional in sound measurement, you can easily get started and enjoy the fun of sound exploration. Additionally, we provide detailed usage instructions and customer support to ensure you have a seamless experience. Download the Decibel Meter X from the App Store now! Let it become your trusted assistant in sound measurement and spectrum analysis, allowing you to delve deeper into the world of sound and enjoy the infinite possibilities it brings!

Screenshots

SmarterNoise Pro4 screens
Decibel Meter X4 screens

Verdict

The call

The clearest difference is review sentiment: Decibel Meter X at 100% against SmarterNoise Pro's 29%. Decibel Meter X also leads on in-app purchases (none vs 4) and rating (4.8 vs 4.4). SmarterNoise Pro's advantage is iOS requirement (12.0 vs 16.0). On price, ratings volume, update cadence and ads there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. SmarterNoise Pro sells 4 one-off in-app purchases. Decibel Meter X asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Decibel Meter X holds the better App Store score, 4.8 against 4.4. Both are backed by a comparable volume of ratings — 31 and 49 respectively. Written reviews point the same way: 29% of SmarterNoise Pro's written reviews are positive against 100% of Decibel Meter X's.

UpkeepUpdate frequency

SmarterNoise Pro ships an update monthly, Decibel Meter X every 4 weeks. The most recent releases landed on September 22, 2026 and October 15, 2026 respectively.

Scorecard5 real differences · 5 level
SmarterNoise Pro versus Decibel Meter X: the parameters behind the verdict, then further details
ParameterSmarterNoise ProDecibel Meter X
PriceFreeFree
Rating4.4 (31 ratings)4.8 (49 ratings) — better
Positive reviews28.6% of reviews100.0% of reviews — better
Number of ratings3149 — better
Update frequencyMonthlyEvery 4 weeks — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPodiPhone, iPad
Requires iOS12.0 — better16.0
Further details — not scored
Size24 MB6 MB
Age rating12+4+
DeveloperJohan Rogard永超 侯

Customer experience

SmarterNoise Pro

All ratings31 ratings
Positive80.6%
Neutral12.9%
Negative6.5%
Written reviews7 reviews
Positive28.6%
Neutral28.6%
Negative42.9%

Decibel Meter X

All ratings49 ratings
Positive98.0%
Neutral2.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

4 purchases

SmarterNoise Pro

One-time4
  • Camera upgrade$0.99
  • Frequency spectrum indicator$1.99
  • Video and audio recording$1.99
Show 1 more
  • Spectrogram display$1.99
None

Decibel Meter X

No in-app purchases

Questions

Is SmarterNoise Pro free?
SmarterNoise Pro is free to download, with in-app purchases available.
Is Decibel Meter X free?
Decibel Meter X is free to download, with no in-app purchases.
Which has better reviews, SmarterNoise Pro or Decibel Meter X?
Decibel Meter X is rated higher. SmarterNoise Pro averages 4.4 out of 5 from 31 ratings, while Decibel Meter X averages 4.8 from 49 ratings.
Do SmarterNoise Pro or Decibel Meter X have ads?
Neither SmarterNoise Pro nor Decibel Meter X shows ads.
Which is updated more often, SmarterNoise Pro or Decibel Meter X?
SmarterNoise Pro ships an update monthly, and Decibel Meter X every 4 weeks. Most recently, SmarterNoise Pro was updated on September 22, 2026 and Decibel Meter X on October 15, 2026.

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